1399947541 has 8 divisors (see below), whose sum is σ = 1423234368. Its totient is φ = 1376760000.

The previous prime is 1399947533. The next prime is 1399947587. The reversal of 1399947541 is 1457499931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1399947541 - 2³ = 1399947533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399947641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3886 + ... + 53056.

It is an arithmetic number, because the mean of its divisors is an integer number (177904296).

Almost surely, 2^1399947541 is an apocalyptic number.

It is an amenable number.

1399947541 is a deficient number, since it is larger than the sum of its proper divisors (23286827).

1399947541 is an equidigital number, since it uses as much as digits as its factorization.

1399947541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49643.

The product of its digits is 1224720, while the sum is 52.

The square root of 1399947541 is about 37415.8728482980. The cubic root of 1399947541 is about 1118.6749692156.

The spelling of 1399947541 in words is "one billion, three hundred ninety-nine million, nine hundred forty-seven thousand, five hundred forty-one".